Plunger



FIG. 1 is an upper perspective view of my new design for a plunger;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a back elevation view thereof;

FIG. 4 is a side elevation view thereof;

FIG. 5 is an opposite side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the drawings depict portions of the plunger that form no part of the claimed design. 

CLAIM The ornamental design for a plunger, as shown and described. 